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  • Overcharged
    Thursday, October 10, 2019 1:57 PM
    The past 28 years of being involved with ATSG’s technical help line has been a continuous learning experience. Particularly when a problem is resolved outside the parameters of what would normally fix the problem.

    For example; several years back Lorenzo Ortiz from Phillips transmission had a 2003 Jeep Grand Cherokee 4.0L 4x4 with a 42RE come into the shop for transmission repair. After installing a rebuilt transmission, the vehicle exhibits a misfire. This was not a problem before transmission repairs. Upon inspection, the vehicle has stored a P0352 code for an ignition coil #2 primary circuit fault.

  • Spotting the Changes to Ford 6R80 ’15-Later Valve Bodies
    Thursday, October 10, 2019 1:52 PM
    Ford has made some changes to the ’15-later 6R80 valve bodies that you’ll want to note to prevent any interchange and drivability problems. Following are some of the key identifiers and details on the one valve lineup change to help keep you building successfully.
  • That’s a New One
    Thursday, October 10, 2019 12:34 PM
    There are a lot of us in this industry that have been at it for a long time, and I think most of us have said more than a few times, “Well that’s a new one.” I don’t know how many others of you out there have come across this problem before, but I know in my personal experience I have not. While this is not a terribly technical story, it is one that we found interesting, and as you will see, it had a scenario along the way that would make it a little more difficult to figure out.
  • Allison® 1000/2000/2400, ’00–’15
    Sunday, September 1, 2019 12:00 AM

    Allison® 1000/2000/2400, ’00–’15

    Critical Wear Areas & Vacuum Test Locations

  • A Transmission Problem, Or Something Else?
    Sunday, September 1, 2019 12:00 AM

    The subject of this article is a 2007 Nissan Maxima that was brought to us from a shop that we do a lot of work with. They had initially called and wanted to see if we could point them in a direction on what to look at. The shop had stated the vehicle had code P0868 (secondary pressure down), but after the code was cleared, it had not returned yet the car was still acting up. It would cut out and go into limp mode. I had asked about any other codes in other systems and they said it had a C1109 code (battery voltage out-of-range) in the ABS module, and the battery had been replaced a few weeks ago. I told them to make sure that the charging system was working properly and get back to me with what they had found. 

  • The P0776 Twist
    Sunday, September 1, 2019 12:00 AM

    Tom from “Transmission Shop” in Minnesota had a customer come in with a 2012 Honda Odyssey with a six-speed BYKA transmission experiencing erratic shifts. It had an intermittent and inconsistent 2-3 shift where sometimes it would have a slight flair and bump while other times it would experience a large flair and a bump. Other times it shifted into 3rd then neutral and back into 3rd.

  • General Motors 9T50 Nine Speed FWD: Part Two
    Sunday, September 1, 2019 12:00 AM

    Rotating Clutches - The two remaining clutch packs in the 9T50 are almost a carbon copy of the two rotating clutches used by the 6T40. The clutch names for the six speeds of course are the 4-5-6 and the 3-5 / Rev. The 9T50 clutch packs were renamed 6-7-8-9 and 5-7/ Rev, although they operate the same.

  • General Motors 9T50 Nine Speed FWD: Part One
    Thursday, August 1, 2019 12:00 AM
    Back in early Y2K General Motors and Ford demonstrated some impressive common sense by jointly developing a brand-new six-speed automatic transmission. The 6T70 / 6F50 and 6T40 / 6F35 transmission families have undergone countless changes since 2007 and are used in a variety of different models of vehicles currently.
  • Ford 6R140 - Valve Body Identification Guide
    Thursday, August 1, 2019 12:00 AM

    The Ford 6R140 valve bodies can be difficult to distinguish between the early- middle- and late-styles if you don’t know what to look for. Spotting the differences in the cast-ing numbers, separator plates and the cooler bypass valve is critical to proper identification.

  • Mercedes 7G-DCT Transmission (Part 2)
    Thursday, August 1, 2019 12:00 AM

    Last month’s article spoke about the susceptibility vehicles have with this transmission to bottom out and break the case. Having one of these on our bench here at ATSG (Figure 1), we will take advantage to look inside this transmission to see what it looks like.

Beyond the missions of providing education and reference materials, Transmission Digest serves as a prime resource used as shops find the parts, supplies and services necessary for successful and profitable operation. Nine of the 12 issues published each year are focused on the products, services and suppliers relating to a specific profit center within the retail shop.

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